Ultraviolet Discoloration Watches,Principle of process,1\u3001The color principle: ,Photosensitive discoloration material After the sun or ultraviolet light after thecolorchange;,When the sun is lost Ultraviolet After the return to the original color.So the intensity of its UV test, as a new function is widely used to go out Ultraviolet Protection reminder.,2\u3001The color change,    No color change color: purple, red, blue, yellow, orange, sky blue, green, STRAP :Genuine Calf Leather Details & Beige Lining, MOVEMENT : Quartz Movement,SIZE   : 40mm Case Size, 0.8mm %G, LENGTH   : Strap Length 115mm \/ 75mm,WIDTH  : Leather Width 20mm